Using trigonometry to calculate length


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a) 
Jake measured the height of a building. He stood 30 m away and measured the angle to the top of the building as 58°.
Which method did Jake use to work out the height of the building (h)?
(A) 30 cos 58º (B) 30 sin 58º (C) 30 tan 58º (D) 30 cosec 58º
(E) None of these. The correct method is ____________________



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b) 
Whetu is building a skateboard ramp. He wants it to be at an angle of 24° and 2 m long.
Which method would Whetu use to work out the length of the base (b)?
(A) 2 cos 24º (B) 2 sin 24º (C) 2 tan 24º (D) 2 cosec 24º
(E) None of these. The correct method is ____________________
